Low-carb diets help people with obesity lose a little weight at first, but the benefits fade after a year, so they might not work well for keeping weight off long-term.

If you're overweight and eat fewer carbs instead of less fat for four weeks—without counting calories—you might lose about 8 pounds more than someone on a low-fat diet, and it might be because you're losing more body fat.

If you're overweight and eat fewer carbs instead of less fat for four weeks, you might lose more body fat—even if you lose the same amount of total weight as someone on a low-fat diet.

Eating fewer carbs might help lower blood pressure a little bit over time, especially in people who are overweight.

If you're a healthy woman with obesity and you eat very few carbs for 6 months, you'll likely lose more weight and body fat than if you eat low-fat foods — even if both diets have the same number of calories.

If you're a healthy woman with obesity and you eat very few carbs for 6 months, you'll likely lose more weight and body fat than if you eat low-fat foods — even if you're eating the same number of calories in both cases.